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Influence of southern pine beetle on fungal communities of wood and bark decomposition of coarse woody debris in the New Jersey pine barrens

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Forestry Research 2021年第1期1卷 155-162页

作者： John Dighton Emily Walsh glen groben Ning Zhang Rutgers The State University of New JerseyDepartment of EcologyEvolution and Natural Resources/Department of BiologyCamden and Pinelands Field Station501 Four Mile Road New LisbonNJ 08064USA Rutgers The State University of New JerseyDepartment of Plant Biology59 Dudley RoadNew BrunswickNJ 08901USA

Dead coarse woody debris(fungal food resources)on the forest floor is an ignition source for forest *** rate of decomposition of the debris is largely influenced by fungi,determining its residence time on the forest *** asked if southern pine bark beetle(Dendroctonus frontalis)attack of pitch pine(Pinus rigida)alters the decomposition and fungal community of dead woody *** and bark from beetle infested and non-beetle infested resources were decomposed in litter bags on the forest *** was measured as mass loss and the fungal community by next-generation(PCR and Illumina metabarcoding)*** decomposed slower than wood and resources colonized by beetles decomposed faster than resources with no *** initial differences in fungal communities colonizing the resources continued throughout the 42 months of *** diversity was higher in wood than bark in initial decay stages,but significantly lower in wood than bark at the end of the 42 month *** contrast,there were no significant differences in fungal communities between beetle infested and uninfested *** rate of decomposition of woody resources on the forest floor has great implications for the longevity of fuel sources for forest fires,however,our results indicate that beetle attacked wood poses no greater fire risk than other dead coarse woody debris regarding the residence time.

关键词： forest beet debris

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